Step 1 Make the Pie Dough

In a large mixing bowl combine flour and cold cubed butter Use a pastry cutter or your fingers to break the butter into pea-sized pieces Gradually add ice water one tablespoon at a time until the dough comes together Divide the dough in half wrap each portion in plastic wrap and refrigerate for at least 30 minutes

Step 2 Prepare the Strawberry Filling

In a saucepan over medium heat combine strawberries sugar cornstarch and lemon juice Stir continuously and cook for 5 to 7 minutes until the mixture thickens Let the filling cool completely before using

Step 3 Roll Out and Cut the Dough

Lightly flour a work surface and roll out one portion of chilled dough until it is about 1/8 inch thick Use a heart-shaped cookie cutter to cut out as many pieces as possible Repeat with the second portion of dough Place half of the hearts on a parchment-lined baking sheet

Step 4 Assemble the Hand Pies

Spoon a small amount of cooled strawberry filling onto the center of each dough heart leaving space around the edges Brush the edges with a little water then place a second heart-shaped piece of dough on top Press the edges together with your fingers then crimp with a fork to seal

Step 5 Apply Egg Wash and Bake

Brush the tops of the pies with the beaten egg Use a knife to cut a small slit in the center of each pie to allow steam to escape Bake in a preheated oven at 375°F or 190°C for 18 to 22 minutes until golden brown Let the pies cool on a wire rack before serving